Gear construction



G. FUEGEL AND H. SCHMID.

GEAR CONSTRUCTION.

APPLICATION FILED umzr, 191a,

1,41 5,542, Patented May 9, 1922.

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nome w and HERMAN Sci-1mm GQTTLOB FUL'GEL. 2251 emwm,

GOTTLOB runenr. AND HERMAN soar/rm, 0F ii'ROOKLYN, NEW YORK, ASSIGNOBS, BY MFSNE ASSIGNMENTS, r0 APOLLO MAGNE'I'O conrom'rron, or BROOKLYN, ew YORK, A CORPORATION OF DELAWARE.

GEAR CONSTRUCTION.

Specification of Letters Patent. v

Patented May 9, 1922.

. Application filed December 27, 1918. Serial No. 268,555.

potentate and declared our intentions of becomin citizens of the United States, residing in Brooklyn, in the county of Kings and State of New York, have invented certam new and useful Improvements in Gear Constructions, of which the following is a specification.

Our invention relates to improvements in gear construction; particularly gear construction for the distributer mechanism of magnetos used in the ignition systems of internal combustion engines.

An object of our invention is to provide a gear wheel secured to the element by which it is rotatably supported so as to form therewith a strong, durable and efiicient unit; and to produce such a unit by a method that is quite inexpensive and involves a small number of operations; whereby our improved gear construction can be manufactured in large quantities quickly and at low cost.

A further object of our invention is to provide a gear construction that is quite simple and made up of relatively few parts capable of being readily and easily assema bled.

These and other objects and advantages of our invention are fully set forthin the.

following description, taken in connection with the accompanying drawings; forminga part of the same; and the novel features of our improvement. will be precisely defined in the appended claims. -This disclosure however, is explanatory only, and we reserve the right to resort to changes in the shape, size and arrangement of parts, within the scope and spirit of our invention, to the full extent indicated by the general meanings of the terms in whic h the claim is expressed, and by yariatlons 1n the wording of same. v

On the drawings.

Figure 1 is a sectional view of an element, such as a shaft or journal, on which the gear wheel in our improved gearcon struction is mounted. i

Figure 2 is a longitudinal sect1on through a gear construction according to our inVen-.

tion as it appears when completed; and

Flgure 3 is a front elevation of the parts shown-1n Figure 2, presenting a fragment of the wheel, the remainder being illustrated in brokenlines only.

The same numerals of reference identify the same parts throughout.

In the particular description of the embodiment of our invention herein illustrated, we indicate at l a gear wheel that can be made of fibre or any other suitable K, substance,'and of any des1red size or number' of teeth, as will be understood. This gear wheel will be mounted upon a shaft or journal 2, and the-vgear wheel and its journal will be permanently united together to form a single unit. Preferably the journal 2 is made of metal and is both cylindrical and tubular so as to enable us to save material and make the journal light in weight. As shown particularly in Figure 1, the element 2 is reduced at one end to provide a shoulder 3; and, before'it is united to the gear 1, the bore of the \shaft 2 will be of uniform diameter throughout.

The-gear wheel 1 has a central opening of the same diameter as the reduced outside diameter of the shaft 2, adjacent the shoulder 3, and on one face the gear wheel will be counterbored to provide a shoulder 5 concentric with the opening 4.

To assemble the wheel 1 and shaft 2, we first take a washer 6 and slip it Over the reduced end of the shaft until it abuts against the shoulder 3. The gear, is then placed uponthe shaft 2 by inserting the reduced end of the shaft into the central opening 4 and causing the washer or collar '6 to 'make contact with the face of the wheel 1 opposite to the face having shoulder 5. In this position the reduced end Of the shaft 2 will project beyond the'shoulder or recess 5. Next we apply a washer or collar 7, placing the same upon the reduced end of the shaft and slipping it into the recess 5, which forms a seat for this washer. The washer 7 will be of such dimensions as to fit the shaft and recess snugly, so as to provide for making these parts perfectly tight when the construction is finished.

In order to make a permanent union between the' gear and shaft, the end of the shaft adjacent the-collar 7 is expanded as indicated'in Figure 2. The expansion can be produced inalmost any manner by suit able machines or tools and it results ,in crowding. the metal at the reduced end of the shaft against the collar 7; whereby thegear is forced tightly against the collar 6' and the gear and shaft bound together. The operationis completed by drillinga hole, be tween the shaft 2 and the collar 7 and driving in the same a pin or rivet 8, which further assures a tight connection between the gear wheel and shaft and obviates any likelihood of the wheel turning on the shaft 2 when one uses the gear ditions.

under practical con- The washer 7 may be chamfered along one of its inner edges, as indicated at 9 in Figure 2, to \make room for the expanded end of the shaft2; and the end of the shaft may be groun off so as tobe'flush' with this washer to give a neat,'finished appearance. Between the two Washers 6 and 7 the wheel is caused to be gripped securely, owing to the manner-in which these washers are held by the shaft between the expanded end thereof and the shoulder 3.

sizes; so that-they can be used for the de- By the above method we obtain a gear construction that is-well adapted for the purpose in view, can be produced in large' quantities at small cost and in standard gsired purpose and easily replaced when worn or broken.

. The gear wheel 1 may be also have openings 10 therein for fastening devices to 'enable the insulated rotatable brush of the dis v I tributer mechanism to be secured to it; and the wheel further may be marked with an R and an L to indicate the points at which it must engage with a given point on,

the driving gear,carried by the armature of the magneto, for right'and left hand rotation. 1 v

Having described our invention which .we

believe to benewand desire 'to secure Let- Y ters Patent'of the United States is: A

Thefcombination of a gear wheel having a central opening and a shoulden-surround ing said opening, a, washer engaging said shoulder, a hollow shaft having a shoulder .at one end and a washer engaging the shoul- 'der on said shaft, the gear wheel being fitted gages thew-asher on the shaft, the end of the shaft being expanded against the washer bn upon the shaft s'o'that the gear wheel en- 

